1423172381 has 2 divisors, whose sum is σ = 1423172382. Its totient is φ = 1423172380.

The previous prime is 1423172363. The next prime is 1423172407. The reversal of 1423172381 is 1832713241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1366411225 + 56761156 = 36965^2 + 7534^2 .

It is an emirp because it is prime and its reverse (1832713241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1423172381 - 2¹⁴ = 1423155997 is a prime.

It is a super-2 number, since 2×1423172381² = 4050839252082418322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1423172581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 711586190 + 711586191.

It is an arithmetic number, because the mean of its divisors is an integer number (711586191).

Almost surely, 2^1423172381 is an apocalyptic number.

It is an amenable number.

1423172381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1423172381 is an equidigital number, since it uses as much as digits as its factorization.

1423172381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 32.

The square root of 1423172381 is about 37724.9570046143. The cubic root of 1423172381 is about 1124.8272672412.

The spelling of 1423172381 in words is "one billion, four hundred twenty-three million, one hundred seventy-two thousand, three hundred eighty-one".